Google is developing Google Cast support for Android Auto, as indicated by code strings in version 15.9 that reference Cast integration. This feature will allow audio and video casting from smartphones to cars. Android Auto is also adopting Material 3 Expressive design, with updated media controls in the latest build. While the casting feature is not yet publicly available, it is expected to enhance in-car entertainment experiences. Additionally, Google is testing video support for Android Auto, and the media player in version 15.9 is transitioning to a new design with a refreshed progress bar and button styles, although these features are not enabled by default.